That timeline is interesting.
Those among you who flew the S61 on the North Sea (Penzance, and probably elsewhere) in the 70s will remember the 'oblique' take-off procedure - probably the first use of an approved quasi-vertical procedure. The language of the procedure was interesting: after rotating from the hover, wait for the ASI to flicker (a technical term), rotate and pull full power; for a failure at or before TDP (can't remember what it was) maintain the Nr (hope that the topping was set correctly) and maintain the burbles (another technical term), overpitch to land.
It was absolutely necessary at the specially built facility at Forus, Stavanger and Penzance (can't ever remember calculating the TODR).
I wonder if there were any other of those approved pioneering profiles for other types?
Last edited by Mars; 28th Jul 2023 at 07:15.